Engine Assembly (0-02) Section 0 - Engine Disassembly and Assembly - Group 00 M11 Page 0-62 Viscosity Sensor - Installation Install the viscosity sensor in the cylinder block. Torque Value: 24 [18 ft-lb] Main Oil Pressure Regulator - Installation Measure the free length of the regulator spring. Regulator Spring Free Length mm in 84.1 3.31 Use a spring compression tester to determine if the spring is defective. Replace the spring with a new spring if it is defective. Main Oil Pressure Regulator Spring Load at 48.3 mm [1.90 in] mm in 91.1 MIN 20.50 94.7 MAX 21.30